ライフサイエンスコーパス: hydronium

1 affected by the counterions used (sodium and hydronium).

2 readily transferred to form dihydrogen with hydronium.

3 terconversion between water and hydroxide or hydronium.

4 on pair of sulfuric-carboxylic anhydride and hydronium.

5 re pronounced for the hydroxide than for the hydronium.

6 t from the case of the (localized) classical hydronium.

7 adsorbed water to the electrode surface, and hydronium.

8 is by autoionization-generated hydroxide and hydronium, a process known to have an activation free en

9 The experiments were carried out for hydronium, ammonium, oxygen, chloride, bromide, and iodi

10 The existence of these hydronium amphiphilic pairs is further supported by a Ca

11 lts provide rare examples of water-insoluble hydronium and ammonium salts.

12 headgroup and counterion charges that expel hydronium and chloride ions from the interface and into

13 onsequences of this feature is that both the hydronium and hydroxide ion are decorated with proton wi

14 s that successfully prevent recombination of hydronium and hydroxide ions at 3-coordinate bridgehead

15 neutral pH (i.e., under conditions in which hydronium and hydroxide ions do not participate directly

16 that while the pH is uniform in each system, hydronium and hydroxide ions exhibit concentration gradi

17 and therefore low populated species such as hydronium and hydroxide ions in water.

18 ior work suggesting that water-ions, such as hydronium and hydroxide ions, are potential charge carri

19 ving lithium leakage as low as 0.03%, though hydronium and hydroxide leakage in BMED remains high at

20 orientational ordering, the concentration of hydronium and hydroxide, improper hydrogen bonds and the

21 We report the vibrational spectra of the hydronium and methyl-ammonium ions captured in the C3v b

22 an exist in three protonation states (water, hydronium, and hydroxide); as a result, an alternative t

23 ion of the water molecules and enrichment of hydronium arise from the combination of Cl(-) anionic ch

24 Molecular models for hydronium binding to E(1) versus E(2)-P predict outward

25 s E(2)-P predict outward displacement of the hydronium bound between Asp824, Glu820, and Glu795 by th

26 able AspH(0)-H2O(0)-Arg(+) interactions with hydronium but unfavorable Asp(-)-X(-)/X(+)-Arg(+) intera

27 free energy profiles between the proton and hydronium cases indicates that the magnitude of the free

28 It is also found that the hydronium cation pairs are stabilized by a delocalizatio

29 hanism, a model "classical" charge localized hydronium cation that exhibits no Grotthuss shuttling, a

30 3) O(+) , a hydroxyl radical combined with a hydronium cation through hydrogen bonding.

31 olutions, as Na(+) is similar in size to the hydronium cation.

32 ss shuttling excess proton and the classical hydronium cation.

33 ed excess proton in water (aka the solvated "hydronium" cation) likely has two limiting forms, that o

34 to the explicit models reported previously, hydronium cations (H(3)O(+)) are introduced at the elect

35 lecular layers, enriching the interface with hydronium cations and depleting it with hydroxide anions

36 At 0.43-0.85 M concentrations, hydronium cations are found to form unusual cation pairs

37 is consistent with our earlier finding that hydronium cations can have an "amphiphilic" character du

38 forming solvated electrons, OH radicals, and hydronium cations on fast time scales.

39 les due to charge separation of radicals and hydronium cations.

40 The structural dynamics of hydronium/chloride/water clusters, with relaxation times

41 nded water at 3600 cm(-1) and an increase in hydronium concentration evident in the flanking H(2)O mo

42 fic distances from the substrate with a 1 eV hydronium (D(3)O(+)) or Cs(+) ion beam.

43 the existence of hitherto unexpected cyclic hydronium di-cations trapped within crystal structures.

44 By complexing the solvated hydronium "Eigen" cluster [D3O(+)(D2O)3] with increasing

45 e charge to the H bond network of water, and hydronium (H(3)O(+)) accepted ~4% less negative charge f

46 However, the impact of the hydronium (H(3)O(+)) and hydroxide (OH(-)) ions on the i

47 Both hydronium (H(3)O(+)) and hydroxide (OH(-)) ions were fou

48 In high-pH electrolytes with negligible hydronium (H(3)O(+)) concentration in bulk phase, massiv

49 ids and dissociate to form extra-crystalline hydronium (H(3)O(+)) ions in liquid water.

50 (RMD) calculations confirm the enrichment of hydroniums (H(3)O[Formula: see text]) near Pt surface an

51 shuttling)--H(+), a classical (nonshuttling) hydronium--H(3)O(+), and a potassium cation--K(+).

52 is necessary to reduce clustering of primary hydronium (H3O(+)) and product ions with water molecules

53 n of a minority of pH-governing ions such as hydronium (H3O(+)) ions, thus inducing pH variations acr

54 nel, a proton, which is initially present as hydronium (H3O+), rapidly forms a strong hydrogen bond w

55 electron with the hydroxyl radical yielding hydronium-hydroxide ion-pairs.

56 r dynamics studies were carried out with the hydronium in either the center of a gramicidin monomer o

57 e PCET steps, the proton species (in form of hydronium in neutral/acidic media or water in alkaline m

58 ween the metal hydride and a proton from the hydronium in solution.

59 The hydroniums in direct contact with n-decane have a reduce

60 However, the hydroniums in the second layer of water molecules are mo

61 genation of furfural on Pd/C, increasing the hydronium ion activities by five orders of magnitude (fr

62 tling) proton and a classical (nonshuttling) hydronium ion along two aquaporin channels, Aqp1 and Glp

63 tion of ring-substituted -methoxystyrenes by hydronium ion and by carboxylic acids to form the corres

64 h cases the average O-O distance between the hydronium ion and its nearest neighbor water molecule wa

65 used by the enhanced association between the hydronium ion and the alcohol, as well as a higher intri

66 Subsequently, a bonded complex of a hydronium ion and the nearest backbone phosphate group f

67 tate, MV(2+) reacts with water to generate a hydronium ion approximately 1.5 ps after excitation.

68 ther water to stabilize the bridge through a hydronium ion as well as to produce the hydroxide anion

69 This active site water is a hydronium ion based on the analysis of its hydrogen bond

70 Here we show that hydronium ion catalysis, exemplified by intramolecular d

71 onotonically favors the formation of alcohol-hydronium ion complexes in the micropores.

72 nding on Pd, which decreases with increasing hydronium ion concentration (i.e., 2 kJ mol(H2)(-1) per

73 imit to the reaction rate enhancement by the hydronium ion concentration.

74 cuiting of the hydrogen-bonding motif of the hydronium ion decreases the forward hopping rate through

75 The correctness of the hydronium ion formulation in crystalline H(3)O(+)A(-) sa

76 The presence of the hydronium ion in the channel also inhibits to some degre

77 ergo an exothermic redox reaction, forming a hydronium ion in the solution and a negative charge on t

78 The electrode's response to the hydronium ion is a particular concern because its voltam

79 n of the scissile peptide bond nitrogen by a hydronium ion is an important first step in the reaction

80 which water is inaccessible or hydroxide or hydronium ion is not even momentarily stable.

81 After the hydronium ion is produced, the corresponding hydroxide i

82 Although the hydronium ion itself did not cross the channel gate by t

83 ntagonal dodecahedron H-bonded cage with the hydronium ion residing on the surface.

84 We have characterized the binding of hydronium ion within these host molecules and have synth

85 y acid double bond to attack the active site hydronium ion, followed by the addition of water to the

86 The effects of the hydronium ion, H(3)0+, on the structure of the ion chann

87 Salts of the C(3v) symmetric hydronium ion, H(3)O(+), have been obtained in the weakl

88 ere found to interact with the charge on the hydronium ion, helping in its stabilization.

89 clic polyether hosts form 1:1 complexes with hydronium ion, producing large enhancements in luminesce

90 ing to be converted into an ionically bonded hydronium ion, while a second water molecule bonded to M

91 The hydronium ion-catalyzed hydrolyses of 5-methoxyindene 1,

92 zeolite lattice weaken with the formation of hydronium ion-water clusters and increase the mobility o

93 rst order in nitrite, carbamate species, and hydronium ion.

94 n nitrite, piperazine carbamate species, and hydronium ion.

95 c electrolyte, which can only be ascribed to hydronium-ion intercalation.

96 a basis to generalize and predict rates for hydronium-ion-catalyzed dehydration reactions in Bronste

97 l discharge of water (alkaline solutions) or hydronium ions (acid solutions).

98 The catalytic activity normalized to the hydronium ions (turnover frequency, TOF) passed through

99 ignificantly enhance the association between hydronium ions and alcohols in a steric environment rese

100 , the required spatial rearrangement between hydronium ions and cyclohexanols inhibits further increa

101 heterolytically oxidizes hydrogen to produce hydronium ions and electrons that reduce oxygen.

102 The impact of the concentration of hydrated hydronium ions and in turn of the local ionic strength i

103 The H(+),K(+)-ATPase pumps protons or hydronium ions and is responsible for the acidification

104 ic environment via the formation of hydrated hydronium ions and the negatively charged framework alum

105 k that is collapsed owing to the presence of hydronium ions and weak base cations.

106 Alkanol dehydration rates catalyzed by hydronium ions are enhanced by the dimensions of steric

107 a pH of 5.3, we show that, in cancer cells, hydronium ions are excreted into a small extracellular r

108 nt concentrations of water, stable, hydrated hydronium ions are formed in the pores and at the surfac

109 This confirms that hydronium ions are in exchange with protons in the His37

110 the imidazole and the solvent is mediated by hydronium ions at acidic and neutral pH, whereas hydroxi

111 We demonstrate for the first time that hydronium ions can be reversibly stored in an electrode

112 tion reaction, a real-time monitoring of the hydronium ions concentration, a byproduct of this reacti

113 Here we demonstrate that hydronium ions confined in the nanopores of zeolite HBEA

114 -pore zeolite, such as zeolite MFI, hydrated hydronium ions consist of eight water molecules and have

115 In the presence of water, hydronium ions formed within the micropores of zeolite H

116 e anomalously high mobility of hydroxide and hydronium ions in aqueous solutions is related to proton

117 ed by the participation of support-generated hydronium ions in the proximity of the metal particles.

118 s initiated by electrogenerated hydroxide or hydronium ions in water under reductive and oxidative co

119 ohexanol at a rate significantly higher than hydronium ions in water.

120 The higher activity of hydronium ions in zeolites is caused by the enhanced ass

121 ansition from zeolite Bronsted acid sites to hydronium ions in zeolites of varying pore size is exami

122 Acid catalysis by hydronium ions is ubiquitous in aqueous-phase organic re

123 t accompanies an increasing concentration of hydronium ions leads to an increase in the activity coef

124 ecular dynamics simulations of hydroxide and hydronium ions near a hydrophobic interface, indicating

125 The presence of hydrated hydronium ions next to the Pt surface further lowers the

126 onsted acid site and is assigned to hydrated hydronium ions on the basis of the evolution of the sign

127 The catalytically active hydronium ions originate from Bronsted acid sites (BAS)

128 sted acid sites, converting them to hydrated hydronium ions over a wide range of temperature and ther

129 We found clear evidence that hydronium ions prefer to emerge at interfaces.

130 ophobic paste environment, to the barrier to hydronium ions provided by the pasting liquid and to dec

131 roxide and hydronium ions, (2) hydroxide and hydronium ions rapidly convert donor aldehyde or ketone

132 n provide insight regarding accessibility of hydronium ions to protonate His(E7).

133 All hydronium ions were equally active for the acid-catalyze

134 Hydronium ions were soft-landed at 1 electron volt on co

135 ionization generates catalytic hydroxide and hydronium ions, (2) hydroxide and hydronium ions rapidly

136 ts of approximately 2400 water molecules, 22 hydronium ions, and 10 chloride and contains a single Su

137 at hydrogen ions do not pass through M(2) as hydronium ions, but instead must interact with titratabl

138 urface potential leads to an accumulation of hydronium ions, H(3)O(+), in the electrical double layer

139 t UV absorption can lead to the formation of hydronium ions, hydroxyl radicals, and excess electrons.

140 also of corresponding ionized species, i.e., hydronium ions, which can impact the mechanism and kinet

141 hopping and infrared spectral signatures of hydronium ions.

142 ading to a peak in the intrinsic activity of hydronium ions.

143 Bronsted acid sites eventually convert into hydronium ions.

144 ortions of the pore that are not occupied by hydronium ions.

145 er rate than the direct proton transfer from hydronium ions.

146 ion and ejection of excess charge, primarily hydronium ions.

147 on-specific effects are here overshadowed by hydronium ions.

148 c protons both able to generate the hydrated hydronium ions.

149 by forming a narrow double-charge layer with hydronium ions.

150 s proportionally to the concentration of the hydronium ions.

151 The profile for the classical hydronium is quantitatively intermediate between those o

152 ecular dynamics, models the hydrated proton (hydronium-like cation) as a dynamic excess charge defect

153 These sites might stabilize hydronium-like species formed as protons diffuse through

154 arising from the cationic groups suppresses hydronium migration.

155 ilize an excess protonic charge and act as a hydronium mimic.

156 ounter layer composed of 1.60 water and 0.15 hydronium molecules per platinum surface unit cell at 2.

157 ged NaAOT and CTABr RMs, the localization of hydronium near a counterion or conjugate base reduces th

158 pOHB proceeds through the direct reaction of hydronium or hydroxide with the enzyme-ligand complex an

159 oxygen atoms, followed by facile hydroxide, hydronium or water addition.

160 l oxygens for RNase A to values observed for hydronium- or hydroxide-catalyzed reactions indicate a l

161 ns of 1.68 and 3.26 M, the abundance of such hydronium pairs decreases, and the analysis of the radia

162 tus and experimentally determine the surface hydronium pK(a) [Formula: see text] 4.3.

163 Importantly, the observed Pt-surface hydronium pK(a) correlates well with the pH-dependent HE

164 text]) near Pt surface and predict a surface hydronium pK(a) of 2.5 to 4.4, corroborating the experim

165 channel backbone was observed for different hydronium positions, which were most apparent when the h

166 Hydronium protonation of the hydride on the Mo site is 2

167 Positive ionization with hydronium reactant ions produced only fragments of the T

168 ial pulse voltammogram (DPV) from background hydronium reduction and water electrolysis.

169 As these unprecedented hydronium species are stabilized by the crystal structur

170 ide ions and the pH increases as a result of hydronium stabilization at the interface.

171 eory (DFT) calculations, which confirmed the hydronium storage in PTCDA.

172 The lattice expansion upon hydronium storage was theoretically explored by first-pr

173 ), which may include a minor contribution of hydronium storage, a good rate capability by retaining 7

174 l studies in which the hydrated central core hydronium structure continually switches (O-H...O)* spec

175 We find these doubly charged cyclic hydronium structures to be energetically stable and, as

176 eversible work to separate the hydroxide and hydronium to a distance [Formula: see text] is found to

177 ron is incrementally pulled from the central hydronium to a neighboring water molecule.

178 rbonyl groups are well situated to stabilize hydronium via second-shell interactions involving bridgi

179 positions, which were most apparent when the hydronium was within the monomer.

180 I-PCET that invokes concerted PCET involving hydronium/water or water/hydroxide donor/acceptor pairs,

181 We find that I-PCET is fourfold faster with hydronium/water than water/hydroxide, while both reactio

182 Comparison to the spectra of isolated hydronium, zundel, or eigen ions reveals the inductive e